Skateboard frame



FIG. 1 is a front perspective view of a skateboard frame in accordancewith the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines are for the illustrative purposes only and form no partof the claimed design.

The ornamental design for skateboard frame, as shown and described.